Here are the steps for deep frying meat filled croquettes:

1. Mix the meat mixture with some breadcrumbs or egg white and add the right amount of salt, pepper, soy sauce, pepper and other seasonings and mix well.

2. Heat the oil to medium heat and add the meatballs when the oil is hot, be careful not to overheat to avoid frying.

3. When the lower part of the croquettes is golden brown, gently flip the croquettes with a spatula so that the other side of the croquettes also turns golden brown evenly.

4. After frying, fish out the meatballs with a slotted spoon and place them on kitchen paper to absorb the oil, or you can place them on a baking sheet into the oven and bake them at 150°C for 10-20 minutes.

5. Finally, the meatballs can be served with ketchup, mustard or spice sauce.

The meatballs fried through this method are crispy on the outside and very delicious on the inside.